3.0 SC - Switching to 3.2 Carrera intake manifold and keeping CIS?
 

Hi,

I think my airbox is cracked and I'm thinking of replacing it with the 3.2 Carrera intake manifold but I haven't decided if I should do the EFI conversion or which one I'd do, so I'm wondering if I can just replace the manifold and keep the rest of CIS in place.

Is this possible?

Thanks, Michael

Anything is possible, but this idea probably won't work, cheaper to buy a new air box.
Take a look at photos of both systems and then:
Just think about where and how you would mount the mechanical fuel distributor with the air metering plate?
And more...

964 Intake Manifold
 

I'm also wondering if converting to a 964 manifold might not be a bad idea, I can get one on ebay and the price doesn't seem to bad if I don't need to buy too much else?

e.g.
Genuine Porsche 964 Metal Intake Manifolds & Rubber Sleeves | eBay

Hi Dennis,

Thanks for getting back to me - yeah that makes sense. I'm just wondering how much of a 'system' I could reuse if I upgraded to a 3.2 intake/throttle body/injectors/DME. Same goes for a 964 system - I know I'd need the manifold adapters and I guess a EFI like the megasquirt but would I be able to reuse the rest, e.g. rails and injectors.

I see you've done the EFI conversion, how's that working for you?

Regards, Michael

Check out the Bitz systems. Pretty simple to set up and uses modern EFI with good base map provided.